Derrick.



G. B. JONES.

DERRICK.

APPLICATION FILED 00T.26, 1912 Patented Mar. 10, 19%

2 SHEETS-SHEET 1. h n k n &

G. B. JONES.

DERRICK.

APPLICATION mum 001226, 1912 Patented Mar. 10, 1914 2 SHBETS-BHEET 2.

(Hot/1mg COLUMBIA I'LANOQRAPII COUWA5IIINUTQN. [L c,

Win11 TAES CABLE B. JONES, OF WHITEWOOD, SOUTH DAKOTA.

DERRICK.

manner.

Specification of Letters Patent.

. atcntod Mar. 10, 1914.

Application filed October 26,1912. Serial No. 727.863.

To all whom it may concern Be it known that I, CABLE B. JoNns, a citi' zen of the United States, residing at \Vhitewood, in the county of Lawrence, State of South Dakota, have invented certain new and useful Improvements in Derricks; and I do hereby declare the following to be a full, clear, and exact description of the in vention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to derricks and the object of the invention is to provide a derrick having pivotal beams provided with means for adjustably securing their free ends to the derrick platform, these beams being equipped with sheaves for the reception of the derrick cable, the beams being shifted relatively to each other to space the cable sheaves any desired distance apart whereby to vary the swinging action of the cables on the derrick boom.

With the above object in view, the invention consists of certain novel details of constriiiction and combination of parts hereinafter fully described and claimed, it being understood that various modifications may be made in the minor details of construction within the scope of the appended claim.

In the accompanying drawings forming part of this specification:-Figure 1 is a side elevation of the derrick. Fig. 2 is a front elevation of the derrick. Fig. 3 is a horizontal sectional view taken on the line 3-3 Fig. 1. Fig. 1 is a vertical sectional view taken on the line 4.-4 Fig. 2. Fig. 5 is a detail front elevation of the means for connecting together the upper ends of the uprights. Fig. 6 is a side elevation of the parts shown in Fig. 5. Fig. 7 is a plan view of the parts shown in Fig. Fig. 8

is a cross sectional vieu taken on the line s e Fig. 5.

Referring now to the drawings in which like characters of reference designate simi lar parts, the derrick comprises a substantially rectangular bed frame formed of longitudinal timbers 10 connected at the ends by cross timbers 11, the longitudinal timbers being extended at the rear ends beyond the adjacent cross timber and being provided with hearing boxes 12 to journal the ends of a wheeled axle 13.

Preferably four convergent uprights 14 15, 16 and 17 are fixedly secured at their lower ends to the bed frame and have their meeting upper ends fixedly secured together, there being an inverted U-shapcd strap 18 placed astride of the top and outer edges of the uprights 1 1- and 15, and a second inverted U-shaped strap 19 placed between the confronting inner edges of the said uprights, the legs of both straps being fixedly secured together and to the uprights by bolts 20. An inverted U-shapod strap 21 is arranged on the rear faces of the said uprights and secured in position by bolts 9" passed through the uprights. A U-shaped strap 23 is inserted between the upper ends of the uprights 14!; and with the legs bearing upon the bights of the upper strap 18 and lower strap 19, a bolt 2 1- being passed vertically through the intersections of the straps 18, 19 and The strap 93 performs the function of a brace to preventbulging of the straps 18 and 19 and furthermore forms means of attachn'ient for the uprights 16 and 17, the latter being equipped with L- shaped straps 25 and 26 respectively, these straps being bolted as shown at 27 to the uprights and being provided in their free ends with registering openings to receive the bolt 24-. The bolt 24; is equipped with a nut 27, and is equipped below the nut with a cotter pin 98 which positively prevents cscape of the nut.

A swinging boom 29 is secured at the lower end to the bed frame, through the instrumentality of a turning head 30 comprising a stem 31 which is swivelly mounted in the transverse timber 11 at the rear end of the frame, there being spaced lips 32 formed integral with the stem and receiving therebetween the lower end of the boom, a pin being passed through the lips and through the boom to secure the parts together. For securing the boom in operative position a cable 34 is connected at the outer end to the upper end of the boom and is equipped at the inner end with a hook 35. A pin 36 is secured vertically to the legs of the brace bracket 23 and is equipped with a clevis 37 which interlocks with the hook 35. Chains 38 are secured respectively to the uprights l4; and 1;") and to the cable 31-. these chains limiting swinging movement of the boom in either direction.

Secured to the longitudinal timbers 10 is a cross timber 39 upon which and the adjacent cross timber 1.1 of the -l'ramo a platform 40 is disposed. A pair of divergent beams 11 and 42 are pivoted at the rear ends to the platform through the instrumentality of pivot bolts 43, and are equipped at the forward ends with J-bolts 44: which are passed through slots 44: in the beams and are designed to hook underneath the cross timber 11, there being clamping levers L5 threaded on to the upper ends of the J-bolts, rotation of these handles serving to advance the bills of the J-bolts into the underneath face of the cross timber 11 and adjustably secure the beams in any position of their swinging movements.

The swinging beam all is equipped with a sheave a7, and the swinging beam e12 is equipped with a sheave 4:6.- A boom swinging cable 48 is trained over the sheave 4L6 and is led upwardly along the boom, thence over a sheave 48 at the top of the boom, thence downward and terminally connected to the power drum of a hay grapple .49, after being wrapped a few turns about the latter. A cable 49 is trained over the sheave 47 and led upwardly along the boom, being thence led through a sheave 50 carried at the upper end of the boom and is then terminally connected to the hay grapple. By means of shifting the swinging beams relatively to each other, the cable carrying sheaves 46 and 47 may be placed apart at any desired distance to accommodate the device to different conditions of service, as will presently appear.

In operation the boom is swung by shiftin the weight of the grapple from one cable to the other, and it is thought that this explanation will suffice without more extended description.

For preventing twisting of the cables together due to the grapple rotating, a weighted cable 51 is attached to the grapple and trained over a sheave 52 carried by the boom, this cable normally holding the grapple against any tendency to rotate during swinging of the boom.

By means of adjusting the swinging beams 41 and 42 so as to dispose the sheaves L6 and 47 at various distances from the boom, the speed of the boom may be regulated, since by spreading the beams apart the sheaves will be spaced a considerable distance from the boom, and, consequently, the

speed or the boom increased, while by closing the beams toward each other the sheaves will be disposed near the boom and consequently the speed of the latter lessened. When the wind is blowing against one side of the boom, the related beam must be spaced a greater distance from the boom than the opposite beam in order to facilitate the boom swinging against the wind at the same speed it swings with the wind.

What is claimed, is

A derrick including a support, a mast thereon, a swinging boom carried'by said support and suspended at the free end from said mast, a pair of divergent beams pivotally connected at their nearest ends to said support with said boom between said beams, means for adjustably securing the free ends of said beams to said support, sheaves carried by the free ends of said beams, sheaves carried by the outer end of said boom, a pair of cables trained through respective sheaves on said beams and on said boom, and a load handling device operatively connected to said cables, shifting of the load from one to the other of said cables serving to swing said boom, an adjustment of said beams independently of each other and toward or away from said boom serving to vary the speed of swinging movement of said boom.

In testimony whereof, I affix my signature, in the presence of two witnesses.

CABLE B. JONES.

VVitn esses H. JOHNS, A. H. DAVIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

